Results 61 to 70 of about 142,813 (213)

Kinetics of lithium peroxide oxidation by redox mediators and consequences for the lithium–oxygen cell

open access: yesNature Communications, 2018
The kinetics of Li2O2 oxidation is of high importance to the operation of Li–O2 batteries. Here the authors work on different types of mediators revealing the dependence of the kinetics on the nature of the redox active site and its steric hindrance.
Yuhui Chen   +3 more
doaj   +1 more source

Substrate specificity provides insights into the sugar donor recognition mechanism of O-GlcNAc transferase (OGT). [PDF]

open access: yes, 2013
O-Linked β-N-acetylglucosaminyl transferase (OGT) plays an important role in the glycosylation of proteins, which is involved in various cellular events.
Chen, Xi   +11 more
core   +2 more sources

Steric hindrance induced low exciton binding energy enables low‐driving‐force organic solar cells

open access: yesAggregate
Exciton binding energy (Eb) has been regarded as a critical parameter in charge separation during photovoltaic conversion. Minimizing the Eb of the photovoltaic materials can facilitate the exciton dissociation in low‐driving force organic solar cells ...
Tianyu Hu   +12 more
doaj   +1 more source

Substrates incorporating unnatural amino acids are separately detectable for chymotrypsin and subtilisin with similar specificity

open access: yesResults in Chemistry, 2023
Protease specificity depends on the three-dimensional structure and sequence of the protease, and each protease plays a different role. Chymotrypsin and subtilisin have similar specificity for recognizing aromatic and hydrophobic amino acid residues ...
Yuuki Yamawaki, Tamaki Kato
doaj   +1 more source

Controllable Generation of Reactive Oxygen Species on Cyano-Group-Modified Carbon Nitride for Selective Epoxidation of Styrene

open access: yesThe Innovation, 2021
Summary: The controlled generation of reactive oxygen species (ROS) to selectively epoxidize styrene is a grand challenge. Herein, cyano-group-modified carbon nitrides (CNCYx and CN-Ty) are prepared, and the catalysts show better performance in ...
Hao Tan   +7 more
doaj   +1 more source

Charge-Transfer Probes for Molecular Recognition \u3cem\u3evia\u3c/em\u3e Steric Hindrance in Donor-Acceptor Pairs [PDF]

open access: yes, 1997
Molecular association of various aromatic hydrocarbons (D, including sterically hindered donors) with a representative group of diverse acceptors (A = quinone, trinitrobenzene, tetracyanoethylene, tropylium, tetranitromethane, and nitrosonium) is ...
Kochi, Jay K.   +2 more
core   +1 more source

Design of Small Intramolecular Singlet Fission Chromophore: An Azaborine Candidate and General Small Size Effects [PDF]

open access: yes, 2016
We report the first attempt to design small intramolecular singlet fission chromophores, with the aid of quantum chemistry and explicitly simulating the time evolution of state populations using quantum dynamics method.
Goel, Prateek, Zeng, Tao
core   +1 more source

Understanding steric hindrance effect of solvent molecule in localized high-concentration electrolyte for lithium metal batteries

open access: yesCarbon Neutrality, 2023
High energy density lithium metal batteries (LMBs) have garnered significant research interests in the past decades. However, the growth of lithium dendrites and the low Coulombic efficiency (CE) of Li metal anode pose significant challenges for the ...
Xinpeng Li   +10 more
doaj   +1 more source

Syntheses and Steric Hindrances in 13β-Isopropylgonanes

open access: yesChemical and Pharmaceutical Bulletin, 1965
dl-18, 18-Dimethylestradiol 3-methyl ether (XII), dl-18, 18-dimethyl-19-nortestosterone (II) and their derivatives were synthesized starting from 1-vinyl-6-methoxy-1-tetralol (III) and 2-isopropyl-1, 3-crclopentanedione (IV). The steric effect of the 13-isopropyl group over 17-position was observed in every kind of reactions in this series. Both II and
Kentaro Hiraga   +2 more
openaire   +3 more sources

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